a985343ba9
The vxlan_dev_configure function was mixing validation and application of the vxlan configuration; this could easily lead to bugs with the changelink operation, as it was hard to see if the function wcould return an error after parts of the configuration had already been applied. This commit splits validation and application out of vxlan_dev_configure as separate functions to make it clearer where error returns are allowed and where the vxlan_dev or net_device may be configured. Log messages in these functions are removed, as it is generally unexpected to find error output for netlink requests in the kernel log. Userspace should be able to handle errors based on the error codes returned via netlink just fine. In addition, some validation and initialization is moved to vxlan_validate and vxlan_setup respectively to improve grouping of similar settings. Finally, this also fixes two actual bugs: * if set, conf->mtu would overwrite dev->mtu in each changelink operation, reverting other changes of dev->mtu * the "if (!conf->dst_port)" branch would never be run, as conf->dst_port was set in vxlan_setup before. This caused VXLAN-GPE to use the same default port as other VXLAN sockets instead of the intended IANA-assigned 4790. Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.